Energy dashboard offset with factor of 10 or even more wrong

Configuration
1

Hi!

My Energy Dashboard is showing something but the scale of numbers is all wrong. I haven’t checked exactly but they might be offset with a factor of 10 meaning that the bars should be around 2,5kWh each.

image

Source of data:

I have an Arduino which picks up the pulses from my power meter and counts them for a minute. Every minute the Arduino pushes them to MQTT.

In HA I pick up the pulses like this:

mqtt:
  broker: mqtt
  port: 1883
  username: user
  password: password
  birth_message:
    topic: 'hass/status'
    payload: 'online'
  will_message:
    topic: 'hass/status'
    payload: 'offline'
  sensor:
    - state_topic: "home-assistant/sensor/electricity"
      name: pulses
      # should I say device_class: power here???

From there I build a template sensor like this (also converting from Wh to kWh):

template:
  - sensor: 
    - name: "Electricity use live"
      unit_of_measurement: 'kWh'
      state: >
        {{ (states('sensor.pulses') | int)/1000 }}
      device_class: energy
      state_class: total_increasing

Any idea what I am doing wrong???

Extra:
The markings on the power meter say 1000 impulses / kWh:
image

Dev tools - Statistics sees no issues.

A custom statistics card shows data coming in but at the wrong scale also:
image

2

What happens if you change the following line
{{ (states(‘sensor.pulses’) | int)/1000 }}
to
{{ (states(‘sensor.pulses’) | int)/100 }}

3

Thanks for the suggestion but it was more complicated than that.

I, think :grinning_face_with_smiling_eyes:, I was able to get it working with the following.

First I need a sensor giving me Power. (unit = Watts):

template:
  - sensor: 
    - name: Electricity current power live
      state: >
        {{ (states('sensor.pulses') | int ) *60*6 }}
      device_class: power
      unit_of_measurement: 'W'

This is then with a Helper, called Riemann Integration, made into an energy class statistic (unit = Wh). I didn’t take a screenshot of the UI when I configured it and can’t seem to access it anymore, but this is what I find from the config files:

        "entry_id": "619eaab9cded0738a1e06253ee9c9d3b",
        "version": 1,
        "domain": "integration",
        "title": "Riemann of current power live",
        "data": {},
        "options": {
          "name": "Riemann of current power live",
          "source": "sensor.electricity_current_power_live",
          "method": "trapezoidal",
          "round": 2.0,
          "unit_prefix": "none",
          "unit_time": "h"
        },

This Riemann entity is then what I use in the Energy dashboard.

BONUS:
I could not find it mentioned in the documentation anywhere but apparently the energy dashboard cost entity needs to be in €/kWh. All my numbers were in c/kWh so costs were scary high for a moment :fearful: